1.
Phys Rev Lett
; 126(21): 210602, 2021 May 28.
Artigo
em Inglês
| MEDLINE
| ID: mdl-34114874
RESUMO
We apply a recently developed thermal form factor expansion method to evaluate the real-time longitudinal spin-spin correlation functions of the spin-1/2 XXZ chain in the antiferromagnetically ordered regime at zero temperature. An analytical result incorporating all types of excitations in the model is obtained, without any approximations. This allows for the accurate calculation of the real-time correlations in this strongly interacting quantum system for arbitrary distances and times.